Founded in 1703, Newport County is one of 5 counties in the state of Rhode Island. Historically, Newport County was formed as Rhode Island County in 1703. Renamed Newport County in 1729. The city of Newport is the county seat. With FIPS code of 5, Newport County has a population of 85,264 and area of 102 square miles (264 km2).
List of all cities in Newport County, RI alphabetically
| City/Town | Postal Code | Area Code |
| Adamsville, RI | 02801 | 401 |
| 02837 | 401 | |
| Jamestown, RI | 02835 | 401 |
| Little Compton, RI | 02801 | 401 |
| 02837 | 401 | |
| Middletown, RI | 02840 | 401 |
| 02842 | 401 | |
| Newport, RI | 02840 | 401 |
| 02841 | 401 | |
| Portsmouth, RI | 02871 | 401 |
| Tiverton, RI | 02878 | 401 |